From: dwalker@mvista.com
To: mingo@elte.hu
Cc: linux-kernel@vger.kernel.org
Subject: [PATCH -rt] serial: scheduling with irqs disabled
Date: Wed, 20 Sep 2006 12:11:34 -0700 [thread overview]
Message-ID: <20060920191134.934555000@mvista.com> (raw)
Saw this during bootup ..
BUG: scheduling with irqs disabled: insmod/0x00000000/1110
caller is rt_spin_lock_slowlock+0x89/0x190
[<c0104c3b>] show_trace+0x1b/0x20
[<c0104d44>] dump_stack+0x24/0x30
[<c040ff9e>] schedule+0x10e/0x120
[<c0410d99>] rt_spin_lock_slowlock+0x89/0x190
[<c0411502>] rt_spin_lock+0x22/0x30
[<c0291669>] serial8250_console_write+0x49/0x170
[<c011fa8d>] __call_console_drivers+0x6d/0x80
[<c011fae3>] _call_console_drivers+0x43/0x90
[<c0120265>] release_console_sem+0xe5/0x240
[<c011fe4e>] vprintk+0x20e/0x380
[<c011ffdb>] printk+0x1b/0x20
[<c0140345>] sys_init_module+0xba5/0x1a30
[<c01034d7>] syscall_call+0x7/0xb
---------------------------
| preempt count: 00000000 ]
| 0-level deep critical section nesting:
----------------------------------------
Signed-Off-By: Daniel Walker <dwalker@mvista.com>
---
drivers/serial/8250.c | 4 ++--
1 files changed, 2 insertions(+), 2 deletions(-)
Index: linux-2.6.18/drivers/serial/8250.c
===================================================================
--- linux-2.6.18.orig/drivers/serial/8250.c
+++ linux-2.6.18/drivers/serial/8250.c
@@ -2252,7 +2252,7 @@ serial8250_console_write(struct console
touch_nmi_watchdog();
- local_irq_save(flags);
+ local_irq_save_nort(flags);
if (up->port.sysrq) {
/* serial8250_handle_port() already took the lock */
locked = 0;
@@ -2282,7 +2282,7 @@ serial8250_console_write(struct console
if (locked)
spin_unlock(&up->port.lock);
- local_irq_restore(flags);
+ local_irq_restore_nort(flags);
}
static int serial8250_console_setup(struct console *co, char *options)
--
reply other threads:[~2006-09-20 19:12 UTC|newest]
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